.p1{
    margin-left: 130px;
    font-size: 20px;
}
.bu1{
    float: right;
    color: red;
    border: 0;
}

.bx1{
    width: 99%;
    height: 100px;
    border: 1px solid #ccc;
    margin-top: 30px;
}

.zz{
    width: 100%;
    height: 100%;
    position: fixed;
    background: rgba(0, 0, 0, .5);
    left: 0;
    top: 0;
}
.tc{
    width: 100%;
    height: 300px;
    background: seashell;
    margin-top: 200px;
}